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j'. VAN BRUNL MECHANICAL STOKER.

APPLICATION FILED FMH/21,1918.

' INVENTOR.

A TTORNEYS.

.toit-ivi ve elettive ov veel -ozited in diereut horizontal planessubstztiitially tree from sidetlirusts iiiiile in action. ltI furtherhas for "its object to provide iueeue for actuating roelrerj V. through'counter-shafts `for moving grat-es so that, the pistou is sulosteiiti' itree from side thrusts although iii e difierent plane from thei'ocliiigr; s. further has for its object toprovide iiieaiis foradjusting lthe limits of tiirov o the gratehars and also the extent ortheir movements. rlhe tolloiviiig'ls e description ot ei bodime'iit of minvention .relereuce oem 9 l i,

had to the eceoiiipeiiymg drawing, in which, Figure l showsiii section,oii the liiie big. e, ai Stoker embodying my inveiitioii;

l* 1g. 2 shows zi side elevation o the leitheiid end of the Stoker;

Fig. 3 .sliovvs a partiel end view and e ings, l,

partiel section oii the line 3-3 and "Fig l is it partiel oleo view epartial section oii Athe line Fi-,'Fig Referring* more particularly tothe dreivere series of gratebars, the elteri'iete here or eeeh seriesbeine reoiprooeted lov roelriiighers 2 as iii U. eteiit lilo. 818,010greeted tol?, iooi epit l?, 1906. is a' fuel hopper. els plunger' forfeeding fuel from the hopper to the retort 5, having the usuel movablebottom 6 and lived plate 7. Themovahle plate il ie provided with :inupweirdly projecting lug- 8, 'which is housed Within the plunger e andrigidly secured 'thereto so ee to move it over the' i'ixed plate 7. Thisixed plete is provided with e slot 9 in which the lug il moves to und frivoted to the lug 8 and extending forwardly therefrom ere links l0,which are connected tothe upper end of a lever ll, extending upwardthrough the `enlarged iroiit end of the slot 9 and fulcriin'ied 1Q. rlhelower end of the lever ll is Within a box l-oerried by the piston rod otthe pistou l5, which iileys witiili touv reoiproczites tlee to feed theiluel` e lower tile upper eiid e exis oi" the plunger e thrusts 'ripoiithe piston rod d nger are direct tlii'uste, so that the si(`n e uetsthat. would be present it' -the iiistoii rod and plunger were rigidl;veoiiiiected are avoided.

in. order to operate the rocker-arms Qrovide the head ufp'on the pistourod With tivo( l?, l? end provide tivo suite'loljv mount-edcounter-shafts i8, i8, termiiietiig iu seref-fs i9', l?, which engagethe sorev,r1 hearings. rigs the pist ii reciproogtee, the screw hearingsoe-usei tie screws eiid eo'uiiter-slietts to oseillote. hearing/'saresyiiuiietriozillv,located ou diziiiietriezillv opposite sides oi theaxis o" the pistou their .thrusts are couiiterbelziiieed so that theresultaiit thrust upon the piston rod` Iie e. direct thrust'.

lii order to eoiiiiiiuiiiezite theiuoveiiieiits the counter-Shellt-sl, lto the rocking'- 2, i provide eecli eoi'uiter-shit with ereiil-air'iii2O iiiid eiieli rocking-her with crank-arm 2l zuid eoiiiieot eeolijcrank im 20 with a, Crzmleriii 2l by turiiouolle The eraiik-ziriue 2Oand Q1 are each provided with e plurality oi"- holes 23, 2e so that .theturn-buckles Gau be feoiil'ie'eted to ,the several oraiik-urii'is 'atdif,- ereiit points which will result in 'a varie,- tioii iii the throwor" the movable grate-bars to e.; J shafts i8. ,Bv adjusting thetui-iihuokles '22, however, the relation ot the inner ends ot themovable grate-buns to tlie edges of the retort Afor ziiiy position ofthe counter- `Since the eereiv lOO tren

the piston head having the bearings for4 the connecting devices arrangedsymmetrically relating to the aXis of said piston and its rod, and,moreover, through the connections 22 and crank-arms 2O and Q1, the

throw of the grate-bars can be altered and their position when in restadjusted.

As will be evidenttto those skilled in the. l

art, my invention permits of various modifications without departingfrom the spirit thereof or the scope of the appended claims..

What E claim is .1. 'En a mechanical stoker, the' combination of aretort, movable grate-bars extending from both sides thereof,rocking-bars for moving said grate-bars, a piston and piston'iod locatedin a plane below the plane ot said rocking-bars, counter-shafts in thehorizontal plane of said piston and on opposite sidesthereof, meanscarried by said piston rod for oscillating said counterarmslocated onthe saine 'side of said piston shaft as said piston rod reciprocates,crankaims upon said counter-shafts and rockingbars, 'and means forconnecting those crankrod. i,

2. in a mechanical stoker, the combination of a retort, movablegrate-bars extending from both sides thereof, rocking-bars for movingsaid grate-bars, a piston and piston rod located in a plane below theplane of said rocking-bars, counter-shafts in a eeaeea 3. En amechanical stok-er, the combination of a retort, Imovable grate-barsextending from both sides thereof, rocking-bars or moving saidgrate-bars, a piston and piston rod llocated in a plane below the planeof said rocking-bars, counter-shafts in the horizontal plane of said'piston and on opposite sides thereof, means carried by` said pistonrod for oscillatingsaid countershaft as said piston rod reciprocates,crankarms upon said countershafts and rockingbars, and means forconnecting those crankarms l'ocated'on the same side of said piston rod,said connecting means being adjustable laterally relatively to saidcrank-arms.

4i; in a mechanical Stoker, the combination orp a retort, movablegrate-bars extend'- 4ing from both sides thereof, rocking-bars formoving said grate-bars, a piston and a pistn rod located in a planebelow the plane of said rocking-bars, counter-shafts in the horizontalplane of said piston and on opposite sides thereof, a screw carried bysaid counter-shafts and screw bearings carried by the end of said pistonand engaging with( of said piston rod. JOHN VAN 4BRUNT.

